.zoomin {
    background-image:url(../img/icon_zoomin.png) !important;
    height:20px !important;
    width:20px !important;
}
.pan {
    background-image:url(../img/icon_pan.png) !important;
    height:20px !important;
    width:20px !important;
}
.back {
    background-image:url(../img/resultset_previous.png) !important;
    height:20px !important;
    width:20px !important;
}
.next {
    background-image:url(../img/resultset_next.png) !important;
    height:20px !important;
    width:20px !important;
}
.centrar {
    background-image:url(../img/centrar.bmp) !important;
    height:20px !important;
    width:20px !important;
}